User Guide

CCS Technical Documentation BB Description & Troubleshooting

Company Confidential RH-4

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Audio Faults

Is IHF speaker

working

Try change

speaker. Is it

working now?

Set Phoenix LOCAL

mode. Select Maintance -

>audio test. Set Ext in

IHF/Ext out ON.

Measure DC volts on

speaker pads.Are they

~0.5VBat to GND?

Measure Shutdown

voltage on R168. Is it

~1.8V

Check C155, C158,

C162, R167, R164,

R165, R163,C161,

lines.

If ok change N150

Check R168, line. If ok

chagne N150. If still fail,

change UEM.

Check C164,C165,L151,

L152, C177, C178, Vbat.

If ok, change N150

Yes

End